Derma DProperties help

[Pandaman09]

I am trying to use a DProperties panel in a project and I can get it to draw but I'm having problems retrieving the values.

panel.dProperties = vgui.Create("DProperties")
	panel.dPropertiesCanvas = panel.dProperties:GetCanvas()
	local Settings = panel.dProperties
	local SettingsCanvas = panel.dPropertiesCanvas
		 Row1 = Settings:CreateRow( "View Settings", "Grid" )
			Row1:Setup("custbool")
			Row1:SetValue( false )
		local Row2 = Settings:CreateRow( "View Settings", "Line Spacing Width" )
			Row2:Setup("Int", {min=5, max=FrameW})
			Row2:SetValue( 5 )
		local Row3 = Settings:CreateRow( "View Settings", "Line Spacing Height" )
			Row3:Setup("Int", {min=5, max=FrameH})
			Row3:SetValue( 5 )
		local Row4 = Settings:CreateRow( "Box Settings", "Box Size X (Percentage)" )
			Row4:Setup("Int", {min=5, max=100})
			Row4:SetValue( 75 )
		local Row5 = Settings:CreateRow( "Box Settings", "Box Size Y (Percentage)" )
			Row5:Setup("Int", {min=5, max=100})
			Row5:SetValue( 75 )
		local SettingsX = FrameX+FrameW
		local SettingsY = FrameY
		Settings:SetPos( SettingsX, SettingsY)
		Settings:SetSize( (ScrW()*0.125), Frame:GetTall() )
		SettingsCanvas:SetVisible(false)

I had to make my own DProperties_Boolean type called "DProperties_custbool"

row_bool = {}
	function row_bool:Init()
	
	end
	function row_bool:Setup()
		self:Clear()
		self.box = self:Add( "DCheckBox" )
		local box = self.box
		self.box:SetName("checkbox")
		self.box:SetPos( 0, 2 )
		-- Return true if we're editing
		self.IsEditing = function( self )
			return self.box:IsEditing()
		end
		-- Set the value
		self.SetValue = function( self, val )
			self.box:SetChecked( util.tobool( val ) ) 
		end
		-- Alert row that value changed
		self.box.OnChange = function( box, newval )
			if ( newval ) then newval = 1 else newval = 0 end
			self:ValueChanged( newval )
			panel.dProperties.Categories["View Settings"].Rows["Grid"].value = tobool(newval) --rigged here so i can do something
		end
		self.box.SGetValue = function()
			return self.box:GetChecked()
		end

	end
	derma.DefineControl( "DProperty_custbool", "", row_bool, "DProperty_Generic" )

But I still can't figure out how to retrieve the value with both my custom bool, I can't find the checkbox to run SGetValue on, and I can't figure out how to retrieve the value on DProperty_Boolean